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I am looking for some good 4 bar pop up plans. I will be using the typical, screen door closer, solenoid, motion sensor that is used. But I want to get more lift and don,t want the prop to be laying flat.
 

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Check the Monster List Page, and look for the "Body Slinger" prop. It's easy to build, and it jumps up, and out toward your guests.
 

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gr8johnson
I couldn't find any detailed plans either.
I basically looked at this
FrightProps - Halloween Decorations, Halloween Props, Pneumatic Props, Animated Props, Halloween Accessories
and winged it.
Since you are using a single acting cylinder, a screen door closer, you will have to push from the front instead of pulling from the back. The one in the link above used a double acting cylinder with it resting in extended position.

If you offset the bars a little, you will get more of a forward lung that just straight up.

I built mine in one day out of 2x4's and a screen door cylinder.
Works great.
Here it is.
 
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